Knob-spindle fastener.



D. BORLAND.

KNOB SPINDLE FASTENER. APPLICATION EILED NOV. 24, 1914.

l 1 92,269. Patented July 25, 1916.

2 SHEETSSHEET liwuwntoz UBorZamd,

DELOSS BORLANID, OF ('JI-IARLES'I'O1\l', MISSISSIPPI.

KNoia-sPmnLE "FASTENER.

Specification of Letters Patent.

Patented July 25, 1916.

Application filed November 24, 1914. Serial No. 873,782.

To all whom it may concern Be it known that I, DELoss BORLAND, a citizenof the United States of America, residing atGharleston, in the county ofTallahatchie and State of Mississippi, have invented new and usefulImprovements in Knob-Spindle Fasteners, of which the following is aspecification.

This invention relates to improvements in combined locks and latches fordoors and has particular application to means for holding the latchingbolt against movement to retracted position under the action of the knobspindle.

In carrying out the present invention, it is my purpose to provide meanswhereby the knob spindle controlling the latching bolt of a combinedlock and latch may be held against turning movement to actuate thelatching bolt to retracted position from the outer slde of the door andwherein the knob spindle of the latching bolt may be relieved of theinfluence of said means from the outer surface of the door through theagency of a key so that a person on the outer side of the door equippedwith the key may open the door subsequentto the latch ing thereof.

It is also my purpose to improve and simplify the general constructionof devices of the class described and to provide a device which may bereadily applied to any type of door look now in use.

With the above and other objects in view, the invention consists in theconstruction, combination and arrangement of parts hereinafter set forthin and fallingwithin the scope of the claim.

In the accompanying drawings, Figure 1 is a fragmentary side elevationof a door provided with a lock equipped with a device constructed inaccordance with the present invention. Fig. 2 is a vertical sectionalview therethrough. Fig. 3 is a horizontal sectional view through thesame showing the key in position to release the knob spindle.

Fig. at is a view in side elevation of the inner side of the escutcheonplate carrying the latching device for the knob spindle. Fig. 5 is avertical sectional view showing a modified form of the invention. Fig. 6is a view in elevation of the inner side of the escutcheon platecarrying the modified form of the invention. Fig. 7 is a perspectiveview of the device shown in Figs. 5 and 6 removed from the escutcheonplate. Fig. 8

is a view in elevation of the inner side of the formedwith a mortise 2opening onto the forward edge and seated within the mortise 2 is anappropriate form of combined lock and latch 3 embodying the usuallocking bolt 4: capable of sliding movement to projected and retractedpositions under the action of a key, and a latching bolt 5 adapted forsliding movement to projected and retracted positions, the outer ends ofthe bolts 4 and 5 being movable into openings formed in the door jamb,as usual.

Suitably fastened to the inner and outer surfaces of the door areescutcheon plates 6 respectively formed, adjacent to the upper endsthereof, with openings 7 alining with openings v8 in the casing of thelock 3 and passedthrough these alining openings and the operating deviceof the latching bolt is a knob spindle 9 having the inner and outer endsthereof provided with the usual knobs 10. Also formed in the escutcheonplates 6 below the openings 7 therein are key holes 11 alining with eachother and with similar holes formed in the lock casing so that a key maybe introduced in the lock to actuate the locking bolt 5.

In accordance with my present invention, the device for locking the knobspindle against turning movement is carried by the escutcheon plate onthe inner side of the door and comprises a vertical bar 12 mountedwithin a guide strap 18 secured to the inner face of the escutcheonplate. This bar 12 is capable of vertical sliding movement along theinner face of the particular escutcheon plate and has the upper endthereof enlarged in cross dimension to provide a head 14 disposedadjacent to the spindle opening in the escutcheon plate and formed witha non-circular recess 15 corresponding in shape to that of the knobspindle and adapted to engage the latter when the bar ismoved upwardly.Formed in the escutcheon plate adjacent to the lower end of the bar 12is a vertical slot 16 and projecting through the slot 16 is a pin 17having the inner end thereof secured within an aperture in the bar andthe outer end provided with a thumb piece 18, and surrounding the pin 17between the bar 12 and the escutcheon plate is a leaf spring 19 actingto hold the bar in elevated and lowered position.

In practice, when it is desired to lock the knob spindle againstrotation so that the latching bolt cannot be retracted from the outerside of the door, the pin 17 is moved upwardly within the'slot 16 underthe action of the thumb piece 18 and the recess 15 encircles theknob-spindle and so holds the lat ter against rotation.

In order that the bar 12 may be moved downwardly from the outer side ofthe door so as to release the knob spindle, a finger 20 is connected tothe lower end of the bar 12 and extends downwardly therefrom and has thelower extremity formed with an offset portion 21 disposed adjacent tothe key hole in the escutcheon plate.

22 designates a key comprising a shank 23 of a length substantiallyequal to the thickness of the door and having a lug 24 formed on one endthereof extending laterally therefrom and the opposite end formed with amanipulating head 25. Then the bar 12 is in elevated position, theoffset 21of the finger 20 is disposed adjacent to the upper end of thekey hole slot in the escutcheon plate carrying the bar and when it isdesired to lower the bar 12 under the action of the key 22, the shank 23of the key is passed through the alining key holes so that the lug endof the key is disposed in proximity to the offset 21. The key shank isnow rotated under the action of the head 25 and in the rotation of theshank the lug 24 engages the offset 21 and moves the latter downwardly,thereby withdrawing the head 14 from engagement with the knob spindle sothat the latter may be rotated and the latching bolt retracted to openthe door.

In the modified form of the invention illustrated in Figs. 5, 6 and 7,the device comprisesa stem 26 mounted within a guide strap 27 secured tothe inner face of the escutcheon plate on the inner side of the doorbelow the spindle opening in said plate. This stem 26 is capable ofvertical sliding movement relatively to the escutcheon plate and has thelower endthereof provided with a transversely extending head 28 havingthe lower surface thereof curved longitudinally as at 29 and adapted tomove into proximity to the key hole in the escutcheon plate in thedownward movement of the stem. The up,- per end of thestem 26 is curvedas at 30 so as to extend around the spindle opening in .the escutcheonplate and the extremity of the curved end portion terminates in verticalahnement with the straight portion of the stem, as clearly illustratedin Fig. 6 of the drawings. Formed on the upper extremity of the stem isa vertical bar 31 having the lower end thereof pointed as at 32 andadapted to enter an opening in the knob spindle. plate immediatelyadjacent to the upper end of the bar 31 is a slot 34 and passed throughthe slot34 is a pin 35 having the inner end thereof secured within arecess formed in the adjacent extremity of the bar 31 and the outer endprovided with a'thumb piece 36. A leaf spring 37 surrounds the pin 35between the bar and the inner face of the escutcheon plate and acts tohold the bar in elevated and lowered position.

When it is desired to lock the latching bolt of the door lock againstmovement to retracted position under the action of the knob spindle, thepin 35 is forced'downwardly within the slot 34 under the action of thethumb piece 36, thereby lowering the bar 31 and engaging the pointed end32 thereof in the opening 33 in the knob spindle whereby the latter islocked against turning movement. In the downward -.movement of the bar31 the stem 26 is similarly moved, thereby moving the head 25 intoproximity to thekey hole. To relieve the knob spindle of the influenceof the bar 31 from the outer side of the door, the shank 23 of the key22 is passed through the alining key holes in the outer escutcheon plateand the side walls of. the lock casing and when the lug end of the keyshank is adjacent to the head 28 on the stem 26, the key is rotated,thereby engaging the lug with the curved edge of the head and elevatingthe latter and the stem and bar.

In the modified form shown in Figs. 8 and 9 of the drawings, I haveillustrated a construction somewhat similar to the pre ferred form ofthe invention, but in this instance, the upper end of the bar 12 isformed with an elongated head plate 38 disposed at an obtuse angle tothe bar 12 and formed with a partially circular open- ,ing 39 throughwhich the knob spindle 9 is passed, and a non-circular opening 40contiguous to the opening 39 and disposed Formed in the escutcheon belowthe latter and opening thereinto. This non-circular opening 40corresponds in shape to the cross sectional configuration of the knobspindle 9 and formed on the end wall of the opening 40 and extendinginto the latter is a pointed lug 41 adapted to enter an opening 42formed inthe adjacent portion of the knob spindle, when the bar 12 ismoved upwardly. The upper portion of the head plate 38 is formed with anoutwardly extending guide finger 43 disposed in a plane coincident withthatof the head plate and slidably mounted within a guide strap 44appropriately fastened to theadjacent portion of the escutcheon plate 16. In this form of the invention, when the bar 12 is elevated under theaction of the thumb piece 18 as previously described, the head plate 38moves in a plane diagonally to the bar and the non-circular opening 40surrounds the adjacent portion of the knob spindle, while the lug 41enters the opening e2 in the knob spindle, thereby effectively latchingthe knob spindle against turning movement under the action of the knobs.On the other hand, when the direction of movement of thebar 12 isreversed, the plate 38 is moved in the opposite direction and the lug 31withdrawn from the opening 42, While the opening 39 surrounds the knobspindle, thereby enabling the latter to be freely rotated.

If desired, lugs &5 may be secured to the inner surface of theescutcheon plate 6 adjacent to the key hole opening 11 in the path ofmovement of the lug 24 of the key 22 and the lug 24 of thekey 22 formedwith recesses 46 corresponding to the lugs 45 and adapted to receive thelatter when the key is inserted in the key hole to relieve the knobspindle of the influence of the plate 38 from the outside of the door.By means of the lug 45, it will be seen that the latching device willrespond only to the particular key, the lugs 45 preventing turning movement of keys other than those formed with recesses corresponding withsuch lugs.

From the foregoing description taken in connection with the accompanyingdrawings, the construction, mode of operation and manner of employing myinvention scribed and delineated, as modification and variation may bemade within the scope of the claim without departing from the spirit ofthe invention.

I claim:

The combination with the knob spindle of a door latch, of a verticallymovable bar adapted to engage said spindle to hold the latter againstturning movement, a strap at one end of the bar for holding the latterin,

position and guiding the same in its movement, means at the other end ofthe bar for liding the same to release and engage the knob spindle, andmeans formed on one end of said bar and having a curved edge adapted toreceive a key whereby the bar may be actuated independently of saidmeans.

In testimony whereof I afiix my signature in presence of two witnesses.

DELOSS BORLAND. Witnesses:

BOB PARKER, B. G. SANDERS.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents,

Washington, D. C.

a at that I have provided a device whereby the

